Machine for folding sheets of paper and inserting them in envelops.



W. H. YGUNR MAOHINB FOB FOLDING SHEETS OF PAPER AND INSERTING THEM IN ENVELOPS.

K APPLICATION FILED M11128, 1907. 1,43%

latented Dec. 10, 1912 5 SHEETS-SHEET 1.

Snow;

W. H. YGUNG.

MACHINE r03 FOLDING SHEETS or PAPER AND msmmw 1mm IN 'BNvBLoPs.

' APPLIOATIQR FILE D FEB. 28, 1907.

Fatented Dec. 10, 1912.

' & sums-SHEET z.

gW. YOUNG. MACHINE FOR FOLDING SHEETS OF PAPER AND INSEBTING TEEM IN ENVELOPS.

Patented Dec. 10,1912.

5 SHEETS-SHEET 3.

AYPLIUATIQR FILED FEB-28, 1907.

I W. H; YOUNG. MACHINE FOB FOLDING SHEETS OF PAPER AND INSEB I'ING THEM IN ENYELOPS.

. APPLICATION FILED FEB. 28, 1907.

EU? Patented Dec. 10, 1912.

5 SHEETS-EHEET 4,

W. H. YOUNG. MACHINE FOR FOLDING SHEETS OF PAPER AND INSBRTING THEM IN ENVELOPS.

51 mmnfo'a Patented Dec.10 ,1912.

SSHBETS-SHEET 5.

A?PLIOATION FILED P313 28, 1907.

Wihwooe STATES PATENT OFEIOE.

I wrnnmm HENRY YouNe, OF ,n'rnrms, enoneia.

mnciarmn FOR FOLDING snnnrs or rarer. AND msnnrme THEM nNvnLor-s.

Patentedfie 10. 1912.

Application filed February 28, 1907. Serial No. 359,757.

' To all whom it may concern:

i I i Be it known that I, WILLIAM H. Y UNG, a citizen of the United States, residing at Athens, in the county of Clarke and State of Georgia, have invented certain new and useful Improvements in Machines for F old ing Sheets of Paper and'Inserting Them in Envelops, of which the following is a specification, reference being had therein to the accompanying drawings.

My' invention relates to an apparatus for folding sheets of paper and has for its object to provide a device of this character adapted to fold a sheet of paper, such as letters or circulars, and particularly for use in cases where a large number of letters are I to be folded and mailed.

Another object of the invention is to provide a device for folding a letter or a sheet of paper adapted to insert the same into an envelop, and also to provide means for inserting in the envelop additional inclosures,

. such as a second letter or sheet of paper, or

a return envelop, or both.

In the drawings-Figure l is a perspective viewofan apparatus embodying my ing the sheet being folded. Fig. 7 is a view similar to Fig. 6 and shows the sheet insert-.

ed in an envelop. Figs. 8 and 9 are detail views showing the-operating mechanism.

In the drawings A represents a casing of suitable dimensionsadapted to support and inclose the folding and inserting mechanism.

The top of the'box is provided with a-fiat surface a on which is placed the sheet or letter B to be folded, the said top a being provided with adjustable stop pins 6 arranged to operate as guides for laying the said sheet or letter in roper position thereon.

2 indicates a sha t mounted in suitable bearings in the opposite sides of the casing A, one end of which extends throug the side thereof and has a crank handle secured thereto for rotating the said shaft.

'8 indicates an oscillatin folding blade extending transversely of t e box and supported at its opposite ends by a. pair of bars 8 that are movable in slots 8 in the top a, and pivoted to the inner faces of opposite sides of the box or casing at 8. The top a is provided with a transverse elongated opening or slot 9, connecting the slots 8",

to permit the knife 8 to pass through the top a and carry with it the sheet B and thereby fold it.

4. indicates acam fixedto the shaft 2 and adapted to engage the lever 6. This lever has one end pivoted to a stationary part of the casing and its opposite end provided with a link carrying end, which engages with a cross rod 7 extending transversely between the bars 8'- and at a point between the pivots 8' and the blade 8.' By this construction it will be seen that by the rotation of the shaft 2,

' the cam 4 will en age with the lever 6 and cause the folding lade 8 to oscillate on its pivots 8', and upon the disengagement of the cam 4 with the lever 6 the folding blade will be freeto move in the opposite direction. In order to return the folding blade to its normal position ready for the folding of the next sheet or letter, a spring 7 is provided having one'end fixed to the casing, and

its opposite end connected to the bar 7.

It will thus be seen that by placing a sheet or letter B' on the top a and rotating the shaft 2 the folding blade will be caused to move downwardjthrough the transverse slot' After the edges of-the sheet have been passed through-the slot 9 theywill spread,

a hook at 1ts upperas shown in Fig. 2, and this will prevent the sheet from being carried upward through the slot when the folding blade is released by the cam 4 "and moves upward under the action of the spring 7?.

13 is a transversely arranged shelf mounted within the casing andgadapted to'receive and support the sheet after it has been folded by" the blade 8. "If the blade is ar ranged to firmly press the,. paper .against this shelf 13 the sheet will thus be more sharply folded and receive a more permanentset.'. I

10 indicates a reciprocating plunger arranged to move longitudinally of the ing- A, and When in normal position lies in l 13 adapted to be engaged by an arm 19 a vertical plane a little behind the chord of the are formed by the'movement ofthe folding blade. The plunger 10 is provided with two rearwardly extending rods 10 that move in suitable hearings in the rear end of the casing and operate as 'guidesfor the plunger.

12 indicates a pitman pirotally secured to the back side of the plunger, having its outer end provided with a recess 12".

ll indicates a crank arm fixed to the shaft 2 and provided with-a pin ll. As the shaft 2 rotates the pin 11 mounted at the outer end of the crank arm 11 engages with the recess 12 of the pitman l2 and moves the plunger 10 forward until the sheet is pressed against a vertical partition 14, whereupon by the revolution of 'the shaft and crank arm the pin 11 disengages with the pitman 12. Upon the disengagement of the crank from the pitman 12 a spri g 10,

' having one end fixed to the casing and its opposite end to the plunger, operates to return the latter to normal position, ready to.

be engaged by thepin 1 1., when it has been moved around again to the point of engage-- ment .by the shaft 2.

13, 13 are a. pair of bending rollers arranged parallel to each other and mounted 'to revolve on studs that have hearings in the shelf 13 and in the "under side of the top of the casing. The rollers are supported a suitable distance apart so that the plunger 4 may pass between them with a. small clears5 At-this point I may describe the second operation of folding the letter B. After, the letter has been folded in half" by the tolding blade 8 and the latter is ieturned to normalposition, the rotating crank arm 11 engages with the pitrnan 12 and operates tov move the plunger forward, carrying 'with it. Q

the folded sheet B, that has been deposited in front of the plunger by the blade 8. As the plunger 10 moves forward and between the rollers 13 the latter operate to fold hack the sides I), b of the folded sheet. that extend beyond the opposite 'side edges of the plunger, so that the ends of the paper are bent at right angles to the portion 1/ that lies in front of the plunger, the latter moving forward a. sufficient distance to the front portion of the casing, so that the folded fl'aps of the paper-sheet clear the rollers 13 in close proximity to a partition 14. As soon as the sheet is disengaged by the rollers 13 it will fall of its own weight to the bottom of the easing. and the operations which {will be hereafterilesorihed 'oceur at this lower level. It is ."now necessary to fold .the endsof the paper drawn: fiat one beneath the other and to insertthe folded sheet into an envelop. For this purpose I provide allover 17 pivoted at -18 to some part of, the casing, and provided with a cam on the shaft 2. The arm 19 is fixed to the shaft 2 at such point as to engage the cam 18 at the proper instant and operate the lever 1.7- after the plunger 10 has beenreleased by the crank arlnll.

17 indicates a filler connected to the lever 17, adapted to engage one of the folded .ends I, of the letter at a point. just a little-behind its folded edge, and operates as it moves transversely across the casing to fold that end back against the flatportion b 14 indicates an upright bar or standard arranged preferably at right angles to the partition 4 but separated therefrom so as to leave an elongated opening or slot 15 between them. As the filler moves transversely across the casing, folding the flap 1) down and behind the flat portion b, it engages with the crease of the folded portion 72 and forces'the folded sheet through the slot. 15, and. as this operation takes place, the stand:

ard 14? operates to fold hack the fiapjy? on top of or over the folded flap 1).

C indicates the envelops into which the folded sheets are inserted by't-he filler 17.

The envelops'are supported on abase 16 and have their flaps extended andpressed against the outer side'of'the partition 14,- T he envelops are so arranged relative to the casing that the envelop nearest thereto has its opening ip al'nement with the opening or slot 15. A spring arm 16 connected to the casing operates to hold the envelops in position on the base and to move the envelops successively into position. As the tiller 17 folds the sheet. and forces it through the slot 15 its movement is long enough to insertit. into one of the envelops which lies in the path thereof and to [force the envelop with the inserted sheet or letter out from under the spring arm 16. The envelops will be. prevented from moving backward with the fillerblade 17 by engagement with the standard 14*. When they have become freed from the filler blade 17 theywill fall onto thefloor or into a suitable receptacle through the opening which is provided in the bottom of the casing. v f

20 indicates a pair of spring arms fixed to the casing. These. arms extend in front. of the standard lP andhave their outer ends bent at right angles and slightly pointed, as indicated at 20, so as to extend through the slot 15 and engage the edges 1 of the opening in the envelop; .As the filler 117 forces the.folded sheet into an envelop C,-it comes into sliding contact with the ends QOcansing them to engage with the edge of the envel'op' and force the front and back sides thereof open slightly so that. the filler may easi into the envelop. v

The filler 17% and arm 17. are. preferably connected by a relatively longfrod 17 so 13 "deposit the folded sheet that the folded sheetmay be completely inserted in the envelop and the envelop moved a from its position into a suitable receptacle;

25 indicates a rod rotatable in straps fixed to thepartition 145. One end of the arm is provided with a striker 26 adapted to strike the bell 27 while the opposite end thereof is bent at an-angle'to form an arm 25 to-engage with the envelops. When all of the envelopshave been filled and a new supply is needed .the rod is turned or rotated in the straps by the weight of the arm 25 and thereby causes the striker26 to contact with the bell 27"and "sound a signal, whereby the person operating the apparatus is notified to, put in a new supply of envelops. 1

It is often desirous to insert with the folded sheet or letter a return envelop. Forthis purpose I provide a swinging frame 21, pivotally .mounted on a vertical axle 22 that have, hearings in brackets 22? fixed to the rear of the-casing.

The frame 21 carries a base 21 on which-the envelops rest and are supportedthereon by a springarm 24.

When it is desired to insert a return envelop in the letter to be sent, the frame 21 is swung on its pivot into aposition-so that the fiap of the inner'envelop lies in the pathof the filler 17", as indicated in Fig. 3 which en:

relative toeachother at such points as to.

operate the folding blade, the plunger and the filler in regular order, the movement 0 one following that of the other, and without interfering with each other.

When a half'sheet only is to be folded and placed in .the envelop, the paper is inserted by the operator throughthe slot 9 and allowed to drop down in front of the plunger the cam may be slid on the shaft until 'it is 10 without being operated on by the folding blades. To facilitate the insertion of the half sheet the top ofthe casing is provided with a hinged portion a which may be thrownback as indicated by dotted lines in Fi 2.- It is obvious that when a half sheet is to be folded the movement of the oscillating bladeB through -the slot .9 will be very objectionable and prevent the easy insertion of the sheet. Tooverc'ome this objection the cam 4 is attached to the shaft 2 by means of the set-screw 4. By loosening'this set-screw out of engagement with the lever 6. The blade 8 will then be held in'its uppermost position by the spring 7.

I have described the shaft 2 as rotating and this method of oper ation will in a great many cases be th'emost desirable one. .It

will be noted, however, from a reference to igs. 8 and 9 that all of these parts will opcrate properly and in the correct relation one to another if the shaft 2 is not rotated but rocked through an angle of approximately'180. This method of operation will be found especially advantageous when it is desired to insert-two or more different sheets in the same envelop. This may be accomplishedby rocking the shaft 2. through an angle slightly less'than the angle required for a complete cycle of operations. The

filler blade 17 will thus not be moved far enough to eject the envelop from the machine. This filling process may be repeated as often'as desired within the capacity of the envelop. lVhen the last sheet is inserted,

the shaft is rocked through the full angle and the envelop is thus ejected from the machine. What I claim is 1 In a sheet folding machine, the combination of means for turning the end parts of a sheet at anglesto the central part thereof, and a single sheet folding element ar- 1 ranged to effect by a single engagement with the sheet and at one operation the folding of the end parts upon the central part and the inserting of the sheet thus folded into an envelop.

- 2. Tn a letter folding device, the combinai tion of'a blade for doubling the letter sheet,

a plunger for bending back the opposite ends of the doubled sheet, an envelop support, and a movable blade for folding and inserting the doubled sheet into an envelop on the support and discharging the said en velop from the support at a single operation.

3. .In a machine of the type specified, the

f lcombination of an envelop support, means .for turn ng the ends of a sheet at angles to the central part theerof, and a blade adapted to engage one of the ends to fold it down on the central part, and to again engage the sheet at the crease between the other end and thecentral part to insert the sheet into an envelop on the support.

4. In a machine of the type specified, the combination of an envelop support, a paper support, stationary paper folding abutments, a and a blade adapted to engage one end part of a sheet of paper on the paper support having its end parts turned back at an angle 3 to the central part, the said blade operating in conjunction with the said stationary abut-- ments to fold one end on the central part and by engagement with the sheet at the crease between the other end part and the central part to insert the sheet into an envelop on .the envelop support;

5. In a machine of the type specified, the combination of a means for holding a sheet of paper having its end parts turned back at angles relative to its central part, two stationary folding elements provided with ad jacent parallel paper engaging edges and ablade adapted to move in a curved path passing through one of the end parts of the paper at a point removed from the central part, through the crease between the other 1 operator.

7.- In amachine of the type specified, the

combination of a device for positioning an nvelop to receive a sheet of paper, a means for supporting a sheet of paper having its ends turned back at angles relative to its sides, a blade adapted to fold the ends of the sheet down upon the central part, insert the folded sheet into an envelop and eject.

the envelop from the machine, and a mechanism for actuating the blade whereby its.

movement may be controlled to eject or not to eject the envelop at the will of the operator.

R. In a letter folding device, the combination of a pair of bendersfor folding the opposite ends back with respect to the central part of the sheet. a reciprocating pl'unger movable between the bender-s. a stationary folder. a reciprocating blade movable pastlhe stationary folder, the said blade serving to fold down upon the central part one end of the sheet andto move the sheet bodily past the said stationary folder so as "to fold the other end of the sheet down upon the central part, and means for operating the. plunger and the blade.

9. In a sheet "folding device, the combination of means for folding a sheet, a pair of rollers, a plunger for moving thefolded sheet between the said, rollers for folding back its opposite ends, a base for 'suppporting a pile of envelops, a partition and a standard with a slot between them, means for folding down the said opposite ends of the sheet and forcing it through saidslot andinto one of the envclops, and means for feeding the envelops into position forre,- ceivmg the folded sheets.

10L In a ,sheet folding device, the combination .of means for folding a letter sheet,

'a pair of rollers. a plunger for moving the folded sheet between the said rollers forbendingback its opposite ends, a base for supporting a. pile of eiivelops, a partition and a standard having a slot between them,

means for folding down the said opposite .ends of the sheet and forcing it through said slot and intoone of the en'velops, means for feeding, the envelops into position for receiving the folded sheets, and means for opening an envelop as a folded sheet is inserted.- 1

11. In a machine of the type specified, the combination of a means for supporting a bundle of envelops, a means for supporting -a sheet of paper having its ends turned backat angles relative to the central part, a device for folding down the opposite ends of the sheet upon the central part and insert. ing the sheet into an envelop at one-operation," and'means for feeding the envelcp's into position for receiving the folded sheets;

12.. In a machine of the type specified, the combination of a means for supporting a bundle of envelops, a means for supporting a sheet of paper having its'ends turned'back at angles relative to the central part; means for folding down .the -opposite ends of the v sheet upon the. central part and inserting the sheet into an envelop,;mcans for feeding the envelops into position for receiving the folded sheets. and means for indicating the exhaustion ofthe supply of .envelops.

13. In a machine of'the type specified, the

combination of a means for supporting -a bundle of envelops, a means for supporting a sheet of paper having ils. ends turned back at angles relative to theccntral part, a device for folding down the opposite ends of the sheet onto the central part and'inserting the sheet into an envelop at a siugle'opera-- tion. means for feeding the envelops into position for receiving the foldcd'sheets, and

means for opening the envelops as a folded sheet is inserted. 4

14. In a machine of the type specified. the combination of means for inserting a folded sheet into an envelop, and elastically mounted pointed members adapted'to open the envclop as the sheet is inserted.

In a machine of the type specified, the combination of a plurality of devices for supporting envelop inclosures, means for positioning an envclop'lo receive said inclosures. and a'device for engaging an inclosure from each of said supporting devices and inserting them into an envelop at a single operation.

"16. In a machine of the typespecified, the I combination of mechanism for folding sheet. of paper, -a.dev1ce for inserting the folded sheet into an envelop, and a supporting means for a second inclosurewhereby it may be'separately engaged by the inserting device and inserted into the envelop simultaneouslv with the folded sheet.

, 17,, In a machine of the type specified, the combination of a meansfor folding asheet' of paper, 'a blade adaptedto engagethe sheet and insert itinto an envelop, and means for supporting a bundle of second .inclosures so that one-of them may be engaged by the inserting means and inserted into the envelop with the folded sheet.

to. the inserting device w e'reby one ofthem may be separately engaged by said inserting.

device and inserted into the 'envelo simultaneously with the foldedsheet, an devices I whereby the'feeding'means'may be held in or out of operative position at the will of the operator.

19. In a machine'ofthe type specified,

- the combination of means for positioning an envelop to receive a sheet of paper, mech-. anism for folding a sheet of paper, a blade adapted to engage with the sheet, insert it into an envelop and eject the envelop from the machine, mechanism for actuating the blade whereby its movement may be controlled to eject or-not to eject the envelop at the will of the operator, a device for feeding second inclosures to the .blade whereby one-of them maybe inserted into the'envelop with a folded sheet, and means whereby the feeding devices may be held in or out of operative position at the will of the operator.

1 20. In a sheet folding device, the combination of means for folding a letter-sheet,

a pair of rollers and a reciprocating plunger for bending back its op osite ends, a base for-supporting a pile'o envelops, a partition and a standard arranged with a" slot between them, means for folding down the "said opposite ends of the sheet and forcing it through said slot and into one of the envelops, means for feeding the envelops into position for receiving the folded sheets, means for opening an envelop as a folded sheet is inserted, and means for supporting a pile of return envelops arranged tobe swung into position to be inserted into the other envelops by the folding and inserting nation of means for turning the ends of a vertical sheet back at angles to the central part, a support for the sheet at ailevel be- 1 low that of the turning means, and so arranged in relation thereto that thesheet may move to the said support by gravity, and means for engaging the sheet when'on the said support to fold down the ends upon the central art.

22. In a etter folding device, the combination with the casing, having a to "rovided with a slot, of an oscillating ol ing blade pivoted to said casing and adapted to draw a letter sheet through said slot to fold the same, a pair of benders and a reciprocatory plunger movable therebetween,

eans. 21; In a letter folding device, the combi-- means for operating the plunger, and means for folding and inserting the sheet into an envelop.

-23. In a letter folding device, the combination with the casing, having a top for supporting a letter sheet in which is provided an elongated slot, of adjustable ides for the sheet, an oscillating blade for olding the sheet, a pair of rollers, a reciprocating plunger movable between the rollers to fold back the optposite endsof the sheet, and means for olding down, one upon the other, the said opposite ends.

24. In a letter folding device, the combination of a revoluble shaft, an oscillating folding blade, a cam on said shaft for operating the blade, a reciprocating plunger, a pitman pivotally secured-thereto, a crank arm carried by the shaft arranged to engage with the pitman during'a portion of its movement, means for returning the plunger to,normal position after the crank arm has disengaged the pitman, a partition against which the folded sheet is forced by theplunger, a standard arranged'in" close proximity tothe. said partition so as to form a" slot therebetween, and means for folding down one side of the folded sheet and forcing it through the said slot'to fold down the opposite side. i

25. In a letter folding device, the combi naition with a casing having a top provided with a transverse slot, of a foldin blade, a pairof bars pivoted to the casing or oscillating the said blade, a revoluble shaft, a cam on said shaft for operating the said bars, a pair of rollers for'folding back the opposite ends of the folded sheet, a plunge! for moving the folded sheet between the said rollers, and means for folding dowr fiat the said opposite ends of the sheet and inserting it in an envelop.

26. In a letter foldlng device, thecombi nation with a casing having a top provided with a transverse slot, of a foldin blade a pair of bars pivoted to the casing f r oscil lating the said blade, a revoluble shaft, a cam on said shaft for operating the'sah bars, a pair of rollers for folding backth' opposite ends of the folded sheet, a plunge for moving the folded sheet between th said' rollers, means for. folding down fia the said opposite ends of the sheet and in serting it in an envelop, and means f0 throwing the folding blade out of opera tion.

27: In a sheet. folding device, the combi nation of a revoluble shaft, .a blade for fold ing a letter shmet in half, a cam fixed to set shaft for operating the said blade, a pai of rollers for foldingback the opposite end of the} sheet, a plunger movable between th said rollers, a pitman pivotally secure thereto, a crank arm fixed to the sa1dsha1 and rotatable therewith and arranged to er gage with the said pitman duringaportion of its movement and to be disengaged therefrom during the other portion .of its move-' ment, means for returning the plunger to position to be moved by the said crank arm, and means for folding down the opposite ends of the sheet.

28. In a machine of the class specified,

' the combination of mechanism for folding sheets of paper, an envelop support, and a device adapted to successively engage a plurality of the folded sheets and successively.

insert them into a single envelop on the support.

29. In a machine of the class specified, the combination of mechanism for folding sheets of paper, an envelop support,-a de-' vice adapted to successively engage a plurality of the folded sheets and successively insert them into a single envelop on the support, and means for so actuating said ongaging and inserting device that at the will. of the-operator its motion may be continued to eject the envelop from'the machine.

30. In a sheet folding device, the combination with, a casing having a top provided with a slot, of an oscillating folding blade pivoted to the casing and adapted to draw a .heet through the slot to fold the same, a pair of bender and a reciprocating plunger adapted to In e' between the benders 'to turn back the opposite ends of the folded sheet relative to the central partwhen moving in one direction and to be disengaged from the sheet when moving in-the opposite direction.

31. In a sheet folding device, the combination of a means for folding a. sheet back on itself, a pair of benders engaging the folded sheet when in a vertical position at transverse lines remote from the ends, and

a reciprocating plunger arranged to move between the benders to turn back the ends of the sheet relative to the central part, the

sheet disengaging itself from the plunger by means of gravity.

32. In a sheet folding device, two paperengaging devices situated on two transverse lines remote from the ends of the sheet, and a reciprocating bending device adapted to pass between the engaging devices to turn the ends of the sheet back relative to the central portion when moving in one direction and to be disengaged from the sheet when moving in the other direction, the sheet disengaging itself from the plunger by means i of gravity.

33. In a paper folding machine, the combination of stationary abutments, mechan1sm for turning the ends of a sheet at an gles to the central part thcreofhnd delivering it to a point adjacent the said abutments, and a single folding device-adapted to engage one of the ends of thesheet to fold 1t upon theleentral part and to again engage the sheet at the crease between the other end and the central part to-carry the by fold the second end uponthe first end.

-34. In a sheet folding device, the combination of a pair of. rollers, a plunger-for moving .the sheet between the said rollers for turning .back its opposite ends, a receiving means having an abutment for the central part and an abutment for one of the end parts, anda blade for flattening down the other part in conjunction with the abutment junction with its abutment.

35. In a sheet folding device, the combination of a pair of rollers, a plunger for moving the sheet between the said rollers sheet between the said abutments and therefor the central part, and the first end in con--.

for turning back its opposite. ends, means for supporting a pile of envelops, two ahutments at angles to each other and with a slot between, means for folding, down the opposite ends of the sheet and forcing it through the said slot and into an-envelop, and meansfor. feeding the envelope into position for receiving the folded-sheets.

36. In a device of the class described,-the.

combination of means forv folding the sheeton itself, means for turning the ends of the folded sheet at an angle to the central part thereof, and a single. means for folding said ends upon the central part of the sheet and for inserting the sheet thus folded into an envelop at one operation.

37. In a machine of'the class described,

the combination of a blade for doublin the sheet, sheet-engaging devices situate on; two transverse lines remote from the ends;

of-thesheet, a bending mechanism adapted to pass between the engaging devices and bend back the ends of the'doubled sheet relative to the central part, and a filler for folding and inserting the sheet into an en velop and. discharging the latter, at one of rollers, a plunger for moving the folded sheet between the said rollers for simultaneously turning back its opposite ends, a receiving means having an abutment-for the central part and an abutmentfor one of the end parts, and a blade for flattening down one end part in conjunction with the abutment for the central part, and the other end 1 in conjunction with the end abutment.

tion of means for doubling the sheet, a pair a sheet in half, means for turning 40. In a sheet folding device, the combina-' tion with the casing having a top for supporting the sheet in which is provided an elongated slot, of an oscillating blade adapted to pass through the slot to fold the sheet, a pair of rollers, a reciprocating plungermovable between-the rollers to fold back the opposite ends of the sheet, and means for folding down, one upon the other, the opposite ends.

41. In a sheet folding device, the combination of a sheet support having a slot, a blade arranged to move through the slot to fold back the end parts of the folded sheet relative to the central part, all of the parts of the sheet being arranged vertically, and means for folding down the endparts upon the central part, the last said folding means being positioned below the said turning means so that the sheets while arranged vertically may move from the turning means to the folding means by gravity.

42. 111 a machine of the type specified, the combination of a plurality of means for supporting inclosures, and a single means adapted to engage a plurality of inclosures,

one from each supporting means, and insert them into an envelop by a single operation.

&3. In a sheet folding device, the combination of means for folding a sheet in half, a mechanism for bending the ends oi the folded sheet at angles to the central part, a

of the sheet at angles to the central part support for the said bent sheet, an envelop support, support for folded inclosures,

and a single device mounted to first remove tion with the said sheet support to fold the ends of the sheet upon the central part, and third, to insert the said inclosure and the said folded sheet simultaneously into an envelop on the said envelopsupport. I

4.4. In a sheet folding device, the combination of a mechanism for bending the ends thereof, a support for the bent sheet, an envelop support, a support for return envelop inclosures, and a single device adapted to first engage the flap of a return envelop and thereby remove it from its support, second to engage the bent sheet and by cooperation with the sheet support fold the ends of the sheet upon the central part, third to simultaneously insert the said return envelop and the said folded sheet into an envelop on the said envelop support, and fourth, eject the filled envelop from the support.

In testimony whereof I affix my signature, in presence of two Witnesses.

WILLIAM HENRY YOUNG.

Witnesses E. R. MoGnnson, Gno. H. THORNTON. 

